allright yesterday I installed a new tachometer. I've got the carb set to factory specs. 6500 rpms W.O.T. It will rev to 6000 when I take off from a dead stop and then to 6500 after it planes out. My repair manual says 6900 is where I should be at when at full throttle. Any Idea's? do I need to lean it out more. anything under 5500 and it will randomly miss from time to time. Also it fouls plugs if you don't keep the revs up. factory specs call for 1 turn on the high speed needle. that's where it is setting. I'm afraid of leaning it out in fear of burning a hole in the piston. plugs are oe equivalent and I am still running the oil injection. I synchronized the oil pump (adjusted the cable so the marks line up on the arm) when I rebuilt the engine. Can I lean it out without burning up pistons, if so how much. I am afraid to idle very long because it will load up. It's hard to start. Every time you have to "play" with the throttle to get it to start.